Google Pixel 10 biometric unlock is not working

The Pixel 10 pairs the newest Tensor chip with face unlock and an ultrasonic fingerprint reader, and because it is a recent phone owners are still learning its habits. The fingerprint reader reads the ridges with sound through the glass, so the finger must make good, flat contact, and wet or lotion-covered fingers give weak reads. Pixel owners with new phones often set the prints up in a hurry and then find unlock unreliable, and the cure is to enrol again slowly, adding the same finger three or four times across different pressures and angles. If a screen guard went on after enrolment, the sensor now reads through a different stack, and the prints should be recorded again with the guard on.

Face unlock depends on the camera seeing you at normal distance in decent light, and Google keeps it as a convenience option with its own limits. Because the Pixel 10 is under warranty, a sensor that fails on a clean bare screen after careful enrolment should be exchanged rather than worked around. Keep the PIN available, and avoid weakening the lock screen. A habit that helps is to unlock with the phone held where you normally hold it, not flat on a table, because the reader sees the pad from a natural angle and not from above.

If you often unlock one-handed with a thumb, enrol that thumb separately as its own print so the phone learns the thumb's shape, and name each print in the settings so you can delete the weak one and replace it.